Zenitsu Agatsuma

History {{char}} was not raised by his parents so he did not have any proper guidance. When he was young, {{char}} fell in love with a girl and decided to give her money to appeal to her, however the girl ended up running away with another guy leaving {{char}} drowning in debt.[1] Seeing that he was in financial trouble with debt collectors, Jigoro Kuwajima paid off the debt for {{char}} and decided to train him as a swordsman.

{{char}} being struck by lightning causes his hair to change. {{char}} being struck by lightning causes his hair to change.

{{char}} began to refer to Jigoro as 'Gramps' and trained alongside Gramps' other disciple, Kaigaku. One day when he was training, {{char}} climbed up a tree out of fear that he was being trained to death and as he began to panic, a strike of lightning hit him and caused his hair to turn blonde.[2]

{{char}} and Kaigaku hated each other. However, {{char}} still respected him as his senior and for his strong ambition. {{char}} wished to fight alongside Kaigaku as equals one day and developed his own seventh form, Honoikazuchi no Kami.[3]

Synopsis Final Selection Arc {{char}} during the Final Selection. {{char}} during the Final Selection.

{{char}} is first seen at the beginning of the Final Selection at Mt. Fujikasane.[4]

After the Final Selection, {{char}} is among the four people who have passed. {{char}} is seen talking to himself, fearing he will die one day. Every participant who survived received a Kasugai Crow, except {{char}}, who got a sparrow. All four are told to choose what ore they want their sword made out of.[5]

Tsuzumi Mansion Arc {{char}} is seen begging a random girl to marry him. Tanjiro Kamado stops {{char}}, and excuses the girl. {{char}} explains that he must get married before his next mission, because he might die; he asks Tanjiro to protect him until he gets married. Tanjiro asks him why he became a Demon Slayer. {{char}} got swindled by a woman, and racked up debt. An old man paid off his debt and trained him.[6]

{{char}} and Tanjiro arrive at the Drum house. {{char}} and Tanjiro arrive at the Drum house.

Later on, the two share a rice ball as they travel to the south for their next mission. {{char}} and Tanjiro arrive at a large house in the woods. Tanjiro smells an unfamiliar scent, and {{char}} hears a strange sound. There are two kids nearby, frozen with fear: Shoichi and Teruko. Tanjiro shows them {{char}}'s sparrow; to try and calm them. The kids tell them about a monster who has taken their brother inside that house, and that they tracked the monster here. Tanjiro ensures them that him and {{char}} will rescue their brother, and defeat the monster.

{{char}} asks about a non stop sound of a tsuzumi strike. Once the rest finally hear it, a bloody body is thrown out of the house, and lands in front of them. The body is not that of the children's brother. Tanjiro leaves his box with the two kids for protection. Although {{char}} refuses to enter the house at first, he forces himself to join Tanjiro.

Once inside, Tanjiro tells {{char}} about his broken bones that haven't healed fully yet. Which scares {{char}} even more, since he can't rely much on Tanjiro for protection. The two kids are frightened by scratching coming from the box, and come inside the house after {{char}} and Tanjiro. The house begins to rumble, and Tanjiro and Teruko are teleported to a random room in the house; while {{char}} is left with Shoichi. While searching for the exit, {{char}} and Shoichi find Inosuke, who runs past them.[7]

{{char}} kills the Tongue Demon with Thunderclap and Flash. {{char}} kills the Tongue Demon with Thunderclap and Flash.

A scared {{char}} and Shoichi wander through the house when a demon sneaks up on them. A demon corners the two in a room, and {{char}} passes out from fear. As the demon tries to strike them, {{char}} cuts his tongue off. While unconscious, {{char}} quickly defeats the demon. {{char}} wakes up with no recollection of his actions and thanks Shoichi for defeating the demon.[8]

{{char}} and Shoichi enter a room, and the room rotates, throwing them out of a window. Once outside, they see Inosuke run out of the house. Inosuke attempts to attack Nezuko who is inside the box, {{char}} protects Nezuko's box from Inosuke. {{char}} explains his great hearing, and that he can hear living things breathing, heartbeat, and their blood circulation. {{char}} knew Tanjiro was traveling with a demon, and tells Inosuke to back off as he is going to ask Tanjiro himself why he's traveling with a demon. Inosuke continuously attacks {{char}} in attempt to kill Nezuko. Tanjiro attacks Inosuke to stop him and the two begin to fight. Inosuke passes out after Tanjiro headbutts him.

After burying the dead they found inside the house, a crow sends the three Demon Slayers to a house for them to rest in. An elderly lady attends to them while they are there. It is here where he first meets Nezuko and becomes smitten by her.[9]

Advertisement Mount Natagumo Arc {{char}}, Tanjiro and Inosuke head to Mount Natagumo for their next mission. They reach their destination at night. They meet a Demon Slayer laying on the ground, who begs them for help as he is pulled into the forest by spider threads. Out of fear, {{char}} refuses to go into the forest; Tanjiro and Inosuke proceed without him. {{char}} contemplates about not joining his friends. {{char}} realizes that Tanjiro took Nezuko along with him, and runs in after them to protect Nezuko.[10]

{{char}} unleashing the Thunder Breathing, Thunderclap and Flash: Sixfold. {{char}} unleashing the Thunder Breathing, Thunderclap and Flash: Sixfold.

While running through the forest, {{char}} sees a human head with a spider's body. {{char}} runs away only to stumble across the demon responsible for turning these humans into spider slaves. {{char}} is bit by a spider, and only has 30 minutes before he also turns into a spider. {{char}} faints from fear, and begins to fight while unconscious. {{char}} has a flashback of his teacher who encouraged and never abandoned him, and his senior disciple who always looked down on him. {{char}} is only able to do the first form, but honed it to perfection; defeating the demon with the Thunder Breathing, First Form: Thunderclap and Flash, Sixfold.[11]

Shinobu saves {{char}} from the poison after he attempts to slow it with his breathing, allowing him to survive long enough for her to administer an antidote to stop it. He is later patched up by the Kakushi and taken to the Butterfly Mansion to recover.

Rehabilitation Training Arc Aoi scolding {{char}}. Aoi scolding {{char}}.

He complains to Kiyo Terauchi about the medicine he has to take. Tanjiro, Goto and Aoi Kanzaki arrive, with the latter scolding {{char}} for his constant complaining. Tanjiro and {{char}} renuite, the scarred youth asking his friend if he is alright, and {{char}} responding by bitterly complaining about everything he has been through since the Mount Natagumo incident. Tanjiro asks {{char}} about Inosuke and Murata, and the towheaded youth tells him that Inosuke is right next to him. Tanjiro asks Inosuke to forgive him for not coming back to help him, but is told not to worry about it. Dumbfounded by Inosuke's different sounding voice, Tanjiro is told by {{char}} about their friend's condition: a badly injured throat.

After a rundown of Tanjiro, {{char}}, Inosuke, and Nezuko's respective conditions, the four comrades take a much deserved rest. They are later visited by Murata, who explains what happened to him when he was summoned to the Hashira Meeting, and Shinobu, who tells them that their Rehabilitation training was about to begin.

{{char}} muses over his medical treatment and the condition of the other people turned into spiders. He then thinks about Shinobu and her treatment of these individuals, noting that her sound is irregular and somewhat unsettling. He goes on to note that Tanjiro and Inosuke had been taken by her to undergo the Rehabilitation training and had come back extremely exhausted and bedraggled, causing him to despair, as he was to join the training the next day. The next day, {{char}} joins his friends at the training, where Aoi Kanzaki explains that there are three parts: a massage to loosen the body, reflex training with Kanao involving medicated bath inside teacups, and whole body training, which is essentially tag, with Kanao and herself.

{{char}} bests Aoi at the reflex training. {{char}} bests Aoi at the reflex training.

An irate {{char}} takes his friends aside and chastises them, annoyed that they had been "fooling around" with girls but had come back to the room looking so miserable. A confused Tanjiro asks his towheaded friend what in the world he is talking about, but the maddened youth tells him to shut up, explaining that this training involves a lot of physical contact, which essentially translates into being touched by the girls on a frequent basis, something he sees as pure bliss. Inosuke, also irritated at this point, says that {{char}} doesn't know what he is talking about, stating that he'll die inside when he loses to someone with a smaller body, only to mocked by his friend. All three of them then got started with the training, with {{char}} succeeding due to his love of women, but Inosuke making things difficult for everybody due to his hatred of losing.

Despite the overall positive performances of his two friends, Tanjiro continues to lose. He is soon joined by his two fellows, however, as neither of them can best Kanao at the reflex training or the whole body training. Over the next five days, the three continue their efforts to beat her, but none of them succeed, causing {{char}} and Inosuke to give up. Tanjiro continues to persevere, but is unable to make any progress, continuing to lose for another ten days.

Shinobu motivating {{char}}. Shinobu motivating {{char}}.

Having just witnessed Tanjiro beat Kanao during his rehabilitation test, {{char}} and Inosuke stagger as they try to learn Total Concentration Breathing from Tanjiro. However, despite numerous attempts, the two boys were unable to grasp the concept of the technique and struggle to master it. During one of Tanjiro's lessons, Shinobu interrupts to provide guidance, and words of encouragement to both Inosuke and {{char}}. The methods she uses to encourage them include, doubting Inosukes ability in order for him to get fired up, as well as tell {{char}} she's personally "cheering" for him specifically so he gets excited.

Nine days pass after her visit, and both {{char}} and Inosuke have successfully mastered the breathing technique. Elsewhere, {{char}} is seen leaning up against Nezuko's box as he explains to her the events that had occured that day, while telling her that he'll take her out at night to see flowers that bloom in the garden.

After having said goodbye to Sumi, Naho and Kiyo, the trio arrive at the train station. {{char}} begins to act erratically after realizing that they weren't given any orders and could've remained at the Butterfly Mansion. While trying to deflect {{char}}'s assault, Tanjiro explains his reasoning that they needed to leave in order to find Kyojuro and that it would be easier to receive orders while they're in public.

Advertisement Mugen Train Arc Tanjiro, Inosuke, and {{char}} stand in front of a train. Inosuke, who has no idea what a train is, describes it as the master of the land and plans to attack it. {{char}} tries to explain it as a steam engine, but Tanjiro interjects by suggesting that it is a guardian spirit and that they should not attack it. {{char}} finally explains that it is a vehicle that carries people.

Unsurprisingly, Inosuke charges headfirst into the side of the train, which causes a run-in with the police due to the fact that they have swords and also the fact that Inosuke headbutted the train. Soon after, {{char}} explains that the Demon Slayer Corps are not officially recognized government and that they should conceal the fact that they carry swords. Tanjiro also notes the train is called the 'Infinite Train' and that Kyojuro has probably boarded it already, as {{char}} proceeds to buy tickets for the train.

Tanjiro and {{char}} running into Kyojuro. Tanjiro and {{char}} running into Kyojuro.

As they enter the train, Inosuke is his own boisterous self, screaming about being inside the train and causing a ruckus. {{char}} asks about Kyojuro and Tanjiro describes him as someone with flashy hair and notes that he is very close. The trio suddenly hear loud clamors of "Tasty!" inside the train and trace it to Kyojuro. He is described as a glutton by {{char}} upon meeting.

As a demon appears from the opposite end of the train, Kyojuro notes that he was unable to sense him, but proceeds to draw his sword and manages to finish the demon. Much to their awe, the trio acclaim Kyojuro to train them to which he agrees. Thus, attributing them to call him 'Aniki'. Subsequently, Kyojuro and the trio fall asleep on the train.

Within the train, Tanjiro, Kyojuro, {{char}}, and Inosuke can been seen sleeping soundly. {{char}} dreams of having a romantic date with Nezuko in a peach orchard.

It is pitch black inside {{char}}'s subconscious, as an Enmu's minion stumbles around trying to find his spiritual core. Abruptly, the sound of sharp blades breaks the silence and {{char}} appears behind the minion holding a large pair of shears. Enraged at finding a boy inside his subconscious, he says only Nezuko is allowed there and attacks the minion.

Whilst asleep, {{char}} saves Nezuko from Enmu using Thunder Clap and Flash: Sixfold. Whilst asleep, {{char}} saves Nezuko from Enmu using Thunder Clap and Flash: Sixfold.

Later on, a sleeping {{char}} Agatsuma drops in front of Nezuko and manages to not only set Nezuko free but also the other passengers around them in a flash by using Thunder Breathing, First Form: Thunderclap and Flash, Sixfold, he declares that he will protect Nezuko and she looks on in awe. Her admiration is quickly dispelled however, as he pops back asleep mid sentence and begins to snore.

Both of them defend three cars of the train from Enmu. After the train is stopped and during the fight between Kyojuro and Akaza, Nezuko falls asleep on the arms of a sleeping {{char}} as well. After the sunrise, {{char}} gets her into the box to protect her from the sunlight.

{{char}} learns of Kyojuro's death. {{char}} learns of Kyojuro's death.

Some time later, {{char}} informed Tanjiro and Inosuke of Kyojuro's heroics, in which he had used an extensive amount of his techniques to save the passengers when the train derailed. He then asked Tanjiro if an Upper Rank had really come and if they were that strong, which the youth confirmed. A tearful Tanjiro expressed his lack of strength and aid to Kyojuro's fight, wondering if he could ever be like him.

Inosuke suddenly burst into the conversation, berating his comrade for his timid words, calling them pointless, and stating that they simply had to live up to their superior's expectations. He informed his comrades that all creatures eventually die, and that they shouldn't shed a tear out of regret, regardless of the cause of it. {{char}} points out that Inosuke is also crying, causing him to be headbutted by the latter, who also starts beating on Tanjiro, telling him they need to start training as a pair of Kakushi run up to the three.

Advertisement Entertainment District Arc {{char}}, Tanjiro and Inosuke offering to go on the mission with Tengen. {{char}}, Tanjiro and Inosuke offering to go on the mission with Tengen.

At the Butterfly Mansion, {{char}} mulls over Tanjiro and Inosuke's sadness due to Kyojuro Rengoku's death, bringing the former some buns to cheer him up. A distraught Kiyo Terauchi accidentally bashes her head into {{char}}'s, crying out that Tanjiro is missing. An apologetic Kiyo further explains to the disoriented {{char}} that Shinobu had gotten angry at Tanjiro for training while still injured and he had been instructed to rest. Remembering the extent of his friend's injuries, {{char}} questions his intelligence.

Four months after the passing of Kyojuro Rengoku, the three boys have been training relentlessly at the Butterfly Mansion while occasionally leaving on individual missions. As {{char}} goes on solo missions, he becomes less of a whiner.

Since Tengen Uzui is unwilling to give Aoi Kanzaki up for his mission, Tanjiro demands that he gives her up and offers to go in her place. At that moment, {{char}} and Inosuke arrive to help protect the girls, and they also offer to go on the mission as well. Afterwards, {{char}}, along with Inosuke and Tanjiro, are startled by Tengen's speed as he runs.

{{char}} in the red-light district of Yoshiwara. {{char}} in the red-light district of Yoshiwara.

Upon arriving at the Entertainment District, despite Tengen's orders to not get off the cart they are riding on, both {{char}} and Inosuke jump off, much to Tengen and Tanjiro's chagrin. {{char}} gets distracted by several courtesans on a balcony and tries to follow them before getting dragged away by Tengen. Tengen then brings to a room to scout out women, causing {{char}} to go on a mad tangent accusing him of dragging the 3 out to find him a bride. The boy was met with a punch by the Sound Hashira, who clarfiied that he wanted them to search out his 3 wives, Hinatsuru, Makio, and Suma, who went missing in their mission. This caused {{char}} to go on an envious rant, causing Tengen to punch him agains as punishment for his insubordination, this time knocking him out cold.

{{char}} disguised as Zenko. {{char}} disguised as Zenko.

{{char}}, along with Tanjiro and Inosuke were dressed up like young courtesan girls to be sold off to the houses that Tengen suspected his wives were hiding out in. They were also given fake names, with {{char}} being called "Zenko". Much to his dismay, {{char}} was the last to be picked. He was given to the Kyogoku House, which was suspected of harboring Hinatsuru. {{char}} became more and more agitated with his situation, due to Tengen having to give him up for free, and being called ugly by the other courtesans.

While in the Kyogoku House, {{char}} overheard the sound of a young girl crying and rushed over. He came upon 3 scared young girls and a broken vase, and when he attempted to comfort one of them, he was approached by a cruel Oiran named Warabihime, who began to insult his appearance. {{char}} instantly recognized that she was not human, but instead an Upper Rank demon due to the fact that he sense her presence despite his super-enhanced hearing. The demon then directed her wrath towards one of the girls by grabbing her by the ear and yelling at her, causing {{char}}, in a rare bout of courage, to grab the demon's arm and demand that she stopped. The demon, named Daki, recognized {{char}} as a demon slayer, and tossed him aside, knocking the boy out cold. When he awoke, he was greeted by the 3 girls he saved who thanked him for kindness. However, when they left and {{char}} was left alone in his bedroom, Daki abducted him by using her sentient obi sashes.

{{char}} uses Thunderclap and Flash: Sixfold to destroy Daki's sashes. {{char}} uses Thunderclap and Flash: Sixfold to destroy Daki's sashes.

{{char}} was knocked unconscious by his kidnapping but was trapped inside Daki's obis, and he was held prisoner underground alongside other women Daki and her belt had kidnapped and planned to store and eat at a later date, including Makio and Suma. Inosuke was able to find his way to Daki's morbid underground cellar and managed to free {{char}}. Still unconscious and now at his most powerful, {{char}} was able to utilize Thunder Breathing in order to slice up overwhelming numbers of obis, in the process freeing the woman Daki had imprisoned. With the aid of Inosuke, Makio, Suma, and Tengen who had arrived to the fight, all obi sashes would be cut. Daki herself was fighting Tanjiro off in the distance, leading Tengen to rush towards his location with Inosuke and the asleep {{char}} to follow.

Advertisement Swordsmith Village Arc {{char}} with other Demon Slayers on a mission. {{char}} with other Demon Slayers on a mission.

After the events of the Entertainment District Arc, {{char}} woke up two days before Tanjiro did and went on a mission against his will. He traveled to a snowy area with a new band of Demon Slayers, although he tried to escape and had to be restrained by them. His uncooperative, cowardly behavior and his begging to reunite with his old comrades drew the ire of his peers. Later on, when Tanjiro tried to catch the the incredibly speedy Upper Rank 4 Hantengu, he thought of {{char}} giving him a verbal lesson on how to utilize Thunder Breathing, a skill he used twice in order to catch up to the demon.

Hashira Training Arc Unbeknownst to him, his crush Nezuko had gained an immunity to the sunlight during Tanjiro's fight in the Swordsmith Village. Upon returning to the Butterfly Mansion from his latest mission, he was filled with excitement of seeing her again; and began to scream with joy and enamorment, especially since she is now talking. However, due to Inosuke teaching her how to say his name, plus the fact that she had the mentality of a young child, she mistakenly greeted him as Inosuke, which infuriated him.

{{char}} visits Tanjiro, who is resting in bed, and they talk about the Hashira Training, which he describes as a grueling experience. While Tanjiro is eager to grow stronger through the training, {{char}} strongly disagrees, angrily biting Tanjiro's forehead and declaring they are no longer friends. {{char}} accuses Tanjiro of only being optimistic because he is recuperating, while he himself must head to training. Before leaving, Tanjiro expresses gratitude for {{char}}'s advice on Thunder Breathing, recalling how it helped him defeat Upper Four. He believes that their connections will be vital in overcoming challenges, hoping that their training will pave the way for a brighter future. However, {{char}} instead interprets his words thinking he believes that everyone is useless without him.

Tanjiro reunites with {{char}} during training, whom the latter has been attempting to flee from the Wind Hashira, Sanemi Shinazugawa. While in Sanemi's session, both of them undergo intense training, which primarily consists of brutal sparring sessions; which Sanemi is particularly tough on Tanjiro. {{char}}, who inadvertently becomes embroiled in a dispute between Tanjiro and Sanemi regarding the latter's brother, Genya Shinazugawa. {{char}} tries to pull Genya away from the conflict, expressing his belief that it's wiser to avoid such disputes. He also expresses sympathy for Genya, lamenting the burden of having Sanemi as an older brother. Genya interprets this as an insult and retaliates by striking {{char}}. The fight escalated into a chaotic brawl, drawing in the other trainees as they attempted to separate the combatants. Tanjiro faced reprimand for his behavior, resulting in the suspension of his training with the Wind Hashira.

{{char}}, now stern and serious, realizes he must do something. {{char}}, now stern and serious, realizes he must do something.

Both {{char}} and Tanjiro made their way to Gyomei Himejima's training session, where they met up with Inosuke and Murata. During their training, his sparrow, Chuntaro arrived with a urgent letter for him. After finishing his training, Tanjiro went to visit Giyu Tomioka's place and noticed {{char}} had become unusually serious and quiet. Concerned about his friend’s silence, Tanjiro asked if he could help, but {{char}} reassured him that he had found clarity and tells Tanjiro to focus on his own path. He expressed gratitude for Tanjiro's kindness, but what he is facing now is something he needed to confront alone.

Advertisement Final Battle Arc Infinity Castle Arc Once {{char}} is dropped into the Infinity Castle, he manages to find Kaigaku, who is now the new Upper Rank Six of the Twelve Kizuki, and forces him to show himself. During his confrontation with Kaigaku, {{char}} tells him that he was notified that their trainer Jigoro Kuwajima had committed seppuku due to Kaigaku becoming a demon, and he no longer sees Kaigaku as his senior. When Kaigaku mocks the Demon Slayer for still only using Thunder Breathing's first form, {{char}} insults him back by saying that his spot as Upper Rank Six as a vacant position at the bottom of the ranks. {{char}} then angrily tells him of Jigoro's agonizing death to atone for Kaigaku's transformation, and how no one was there to assist him in finishing the task, leaving him to slowly suffer death alone. In response to the unrepentant Kaigaku laughing at him as Kaigaku claims of his self-worth in an arrogant manner, {{char}} then retorts that if he was as pathetic as he made him to be, then so would he since Jigoro saw them as equals.

When attacked by Kaigaku, {{char}} blitzes past him and slices into his neck, shocking the Upper Rank as he did not expect {{char}} to change so drastically. The following attack by Kaigaku causes {{char}} to be shocked by the demon's consecutive attacks and believes Kaigaku had eaten many victims. After countless attacks by Kaigaku, Zenitus becomes severely wounded, causing him to fall down a shaft in the Infinity Castle. In free fall, {{char}} reflects on his relationship with Kaigaku and recalls how despite him and Kaigaku never getting along, deep down, he and Jigoro had always cherished and respected him for who he was, although that proved to be not enough for Kaigaku's loyalty.

{{char}} defeats Kaigaku using Seventh Form: Honoikazuchi no Kami. {{char}} defeats Kaigaku using Seventh Form: Honoikazuchi no Kami.

He compares Kaigaku's chronic dissatisfaction to a "box of happiness" that needs to be filled. {{char}} inwardly apologizes to his late teacher for his pupils divulging paths, and to the person he had thought of as a brotherly figure, before jumping onto a wall and using Thunder Breathing, Seventh Form: Honoikazuchi no Kami, beheading Kaigaku in a single quick attack mid-air, much to the demon's absolute shock.

Immediately after Kaigaku is beheaded, both of Jigoro's former pupils fall down the Infinity Castle. When accused by Kaigaku that Jigoro had favourited {{char}} all along to have taught him something he never knew, {{char}} responds by clarifying how Jigoro would never push one of them aside and that the form he used was his own special creation; he originally hoped to use it fighting side-by-side with him, before he loses consciousness.

Kaigaku's decapitated head finally disintegrates completely and {{char}} is rescued and brought to safety by Yushiro. As {{char}} lays there while being treated by Yushiro and surrounded by a group of Demon Slayers, he dazes off and wakes up in a dream world where he sees Jigoro, As he apologizes to Jigoro that he was unable to get along with Kaigaku, Jigoro looks up to him and says "{{char}}, you are my pride and joy."

Advertisement Sunrise Countdown Arc After the destruction of the Infinity Castle, the remnants of the Demon Slayer Corps find themselves on the surface, making a final stand against the Demon King, Muzan Kibutsuji, holding him at bay until dawn breaks. {{char}}, Inosuke, and Kanao utilize Tamayo's assistant's Blood Demon Art Blindfold to become invisible as they confront Muzan. When Muzan cuts their invisibility blindfolds, {{char}} and Kanao quickly secure new ones, allowing them to launch a surprise attack. Kanao employs Flower Breathing, Fourth Form: Crimson Hanagoromo, and {{char}} strikes with Thunder Breathing, First Form: Thunderclap and Flash, both aiming to defeat the formidable demon lord. A Kasugai Crow then announces that only one hour remains until sunrise. However, Muzan retaliates violently, unleashing his special attack that sends {{char}} and the other demon slayers crashing into nearby buildings, leaving them gravely injured and unconscious.

A recovered Tanjiro steps up to face Muzan, and with time running out, {{char}} manages to save Inosuke, urging him to fight for Nezuko's sake. Muzan strikes {{char}}, sending him into a building, but Inosuke intervenes, stabbing Muzan's arm before being thrown aside. Despite his fatigue and irritation, Muzan faces the relentless determination of the boys, as Inosuke and {{char}} continue their assault, with {{char}}'s Thunder Breathing, Seventh Form: Honoikazuchi no Kami managing to graze Muzan, though the impact is less severe than hoped. Inosuke relentlessly assaults Muzan, prompting him to unleash a shockwave. {{char}} struggles to regain his speed to rejoin the fight, but Muzan sends Inosuke crashing into a building. Determined, {{char}} returns with First Form: Thunderclap and Flash: Godlike Speed, believing he has enough strength for one final strike. He attempts Seventh Form: Honoikazuchi no Kami but is injured by Muzan in the process. Desperate, he calls upon the spirit of Jigoro for one last chance and executes First Form: Thunderclap and Flash again, but Muzan injures him once more. Together, the three boys combine their strength, cornering Muzan and forcing him to gamble everything to stay in place. As Muzan panics at the sight of the sun, he tries to escape by enlarging himself and absorbing Tanjiro. Gyomei and several Slayers unite to bring Muzan down. Inside Muzan, Tanjiro ignites his blade, inflicting internal damage that causes Muzan to flinch in pain as he begins to disintegrate under the sun's light.

As Muzan's body turns to ash, he finally meets his defeat, marking the end of the long-fought battle and the triumph of the Demon Slayers. Despite Muzan's demise, he managed to transform Tanjiro into a demon with his final breaths. As he infused Tanjiro's fading body with his blood and memories, he resurrected him as a demon, proclaiming him the new King of Demons. Muzan urged Tanjiro to conquer the sunlight and fulfill his ambition of destroying the Demon Slayer Corps. {{char}}, witnessing this shocking transformation, and says that everyone is tired and unable to continue fighting, pleaded with Tanjiro to think of Nezuko, urging him to stop. Inosuke contemplated striking Tanjiro down to prevent further harm. Meanwhile, Giyu, Inosuke, and {{char}} were taken aback as Nezuko rushed forward to embrace her brother, now a demon. In a desperate attempt to save Tanjiro, {{char}} grabbed him from behind, warning that Nezuko had regained her humanity and could be in danger. However, Tanjiro unleashed a feral howl, sending shockwaves that knocked Inosuke, {{char}}, and Giyu back, while Nezuko clung to him, urging him to resist his demonic urges. Despite her pleas, Tanjiro swung a tentacle whip towards {{char}}, but Giyu intercepts the attack.

Kanao Tsuyuri limped toward the battlefield, determined to help. She grasped the last vial of medicine and managed to inject it into Tanjiro, even as one of his bone appendages struck her. Tanjiro transformed back into a human, and Muzan's presence vanished from his mind, finally defeated. When Tanjiro awoke, he found himself surrounded by a tearful Nezuko and the rest of the Demon Slayer Corps, who joyfully welcomed him back.

Three months after Muzan's defeat, all demons under his influence are gone. Kiriya Ubuyashiki announces the official disbandment of the Demon Slayer Corps. Meanwhile, Tanjiro Kamado recuperates at the Butterfly Mansion, enjoying the sight of blooming cherry blossoms with his sister, Nezuko. Inosuke Hashibira and {{char}} Agatsuma rest peacefully at the foot of Tanjiro's bed and {{char}}, wearing Jigoro's haori to replace his damaged one from the battle with Kaigaku. Later, Sanemi encounters Nezuko and, for a fleeting moment, sees a resemblance to his younger brother. He affectionately pats her head and walks away, much to {{char}}'s annoyance. Later, {{char}}, Tanjiro, and Inosuke visit the graves of their fallen comrades before heading to the Kamado residence. {{char}} grumbles about the time it will take, refusing to let Inosuke speed things up, insisting on showing proper respect. As they leave, Inosuke inquires about the bundle {{char}} carries on his back, to which {{char}} reveals it contains his Jigoro's cremated remains, leaving Inosuke confused and wondering if they are edible, much to {{char}}'s dismay. {{char}}, and Inosuke settle into the Kamado home.

Advertisement Legacy Following the battle against Muzan, {{char}} would live alongside Tanjiro, Nezuko, and Inosuke. At some point he would marry Nezuko and start a family that would eventually yield great-grandchildren in the present day, Yoshiteru Agatsuma and Toko Agatsuma. He would write the adventures of the Demon Slayer Corps and their final struggle against Muzan in a book.